How do I loosen a cleat bolt that’s got a rounded hex head? I’ve had the cleats fitted for longer than I care to remember and a couple of the bolts have become pretty seized up. Unfortunately, while attempting to loosen one of them I’ve rounded off the hex head. Now I can’t loosen it at all. I’ve tried a new hex key but to no avail.
Any tips or advice on how to loosen a cleat with a rounded 3mm hex head?